It's not a physical doorway nor a portal. It's a natural formation or something covered in ice and snow. Its presence awakens something in those connected to ancient UFOs beneath Antarctica.

Conspiracy Theorists Think They've Found A Gigantic "Doorway" In Antarctica On Google Maps   IFL Science - October 14, 2024

Antarctica Is Rising Up, And The Effects Could Be Huge   Science Alert - August 19, 2024

Pilotless aircraft (drone) has recently taken to the skies above Antarctica in a test flight that could revolutionize the way scientific data is gathered on the world's ice-covered continent   IFL Science - February 25, 2024